One suggestion: Posibility for select "Local" or "Server" mode on the fly. Whe you click in search button should be great that appears one "Check buton" with text "Local mode" after separator and the rest of the columns. If "local mode" is clicked, the plugin work as now in other case go to server....

yes, it's easily feasible to switch local/remote mode from menu. Nevertheless, I do no want to present users with options that need explanation and understanding. Local/remote is meant for programmer who knows which store is used and uses plugin mode accordingly.